.box{
    position: relative;
    width: 100%;
    height: 100%;
    display: contents;
}
.content{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}
.boxinput{
    width: 295px;
    height: 60px;
    background: white;
    border-radius: 40px;
    line-height: 60px;
}